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Miami vs San Diego weather: climate comparison
Miami is the warmer of the two, averaging 77°F (25°C) over the year against 63°F (17°C) in San Diego. Miami is wetter, with 45.4 in (1154 mm) of precipitation a year to San Diego's 11.7 in (298 mm). Below: every month side by side, from 30 years of ERA5 data (1996–2025).
- Mean temperature
- 24.8°C Miami
17.0°C San Diego - Annual precipitation
- 1154.4 mm Miami
298.4 mm San Diego - Rainy days a year
- 162 Miami
38 San Diego - Sunshine per day
- 10.5 h Miami
10.9 h San Diego
Month by month
| Month | Miami | San Diego |
|---|---|---|
| January | 23.3°C | 17.5°C |
| February | 24.3°C | 17.3°C |
| March | 25.4°C | 17.8°C |
| April | 26.9°C | 19.1°C |
| May | 28.4°C | 20.2°C |
| June | 29.3°C | 21.9°C |
| July | 30.3°C | 24.3°C |
| August | 30.4°C | 25.3°C |
| September | 29.5°C | 25.0°C |
| October | 28.1°C | 23.1°C |
| November | 26.0°C | 20.4°C |
| December | 24.4°C | 17.5°C |
Year at a glance
| Measure | Miami | San Diego |
|---|---|---|
| Mean annual temperature | 24.8°C | 17.0°C |
| Warmest month (avg high) | Aug · 30°C | Aug · 25°C |
| Coldest month (avg low) | Jan · 18°C | Jan · 9°C |
| Annual range (warmest high − coldest low) | 13°C | 17°C |
| Annual precipitation | 1154.4 mm | 298.4 mm |
| Rainy days per year | 162 | 38 |
| Wettest / driest month | Jun / Feb | Feb / Jun |
| Average sunshine per day | 10.5 h | 10.9 h |
In short: Miami is the warmest overall (24.8°C mean); Miami gets the most precipitation (1154.4 mm a year); San Diego is the sunniest (10.9 h a day on average); Miami has the smallest swing between its warmest and coldest months.
Record high 1996–2025: Miami 36.2°C (2024-05-16), San Diego 36.6°C (2020-09-30). Record low: Miami 3.3°C (2010-01-10), San Diego 1.8°C (2007-01-15).
Source: Open-Meteo Historical Weather API (CC BY 4.0). Values are ERA5 reanalysis model data on a ~9–25 km grid, not readings from a weather station, so a single town’s thermometer can differ by a few degrees and local showers can be missed. Monthly means of daily ERA5 values, 1996–2025, for the grid cells nearest Miami (25.76, -80.20) and San Diego (32.72, -117.14).
Which months differ most?
The gap in average highs is widest in May, when Miami runs 15°F / 8°C warmer, and narrowest in September (8°F / 5°C apart). The biggest rainfall difference is in June: Miami gets 6.9 in (174 mm) more on average.
Add a third or fourth city, or swap in any other place, in the full comparison tool. For one city in depth, see the Miami climate and San Diego climate pages.
Compare Miami or San Diego with another city
Questions people ask
Is Miami warmer than San Diego?
Miami is warmer on average: its mean annual temperature is 77°F (25°C) against 63°F (17°C) in San Diego (ERA5, 1996–2025).
Which gets more rain, Miami or San Diego?
Miami, with about 45.4 in (1154 mm) of precipitation a year and 162 days with at least 1 mm, compared with 11.7 in (298 mm) and 38 days in San Diego.
Which is sunnier, Miami or San Diego?
San Diego averages more sunshine: 10.9 h a day against 10.5 h. Sunshine duration is modelled from cloud cover.
How reliable is this comparison?
Both cities use the same 30-year reanalysis, so differences are consistent. Absolute values describe a grid cell several kilometres wide and can differ by a degree or two from the airport station.